Newly updated Firefox 3.6.4 keeps crashing when opened

I have recently updated my Firefox to the 3.6.4 version but every time that I try to open it, it loads but freezes and all I can do is close it. I've uninstalled and reinstalled but this has failed to help.

User Agent

I have recently updated my Firefox to the 3.6.4 version but every time that I try to open it, it loads but freezes and all I can do is close it. I've uninstalled and reinstalled but this has failed to help.
== User Agent ==
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/531.22.7 (KHTML, like Gecko) Version/4.0.5 Safari/531.22.7

For the crash on startup people: Are you able to get Firefox started up in [[Safe Mode]]?
For the crash on Flash people: Please make sure your Flash plugin is up to date: [http://www.mozilla.com/en-US/plugincheck/]
If you're having issues with 3.6.4 and the Flash plugin, please take a look at [[The Adobe Flash plugin has crashed]] and increase the timeout as indicated.

Question owner

Same issues - when i try and open a tab with any significant flash content (some small ads seem O.K. but anything more lie a video and it's a straight-up firefox crash). Have updated flash to the latest version and had no problems with 3.6.3. I'm getting firefox completely crashing (i get the "firefox has crashed" dialog) a lot due to flash being everywhere.

Adjusting the timeout doesn't do anything - the plugin isn't crashing - it's firefox that crashes. Currently looking to revert to 3.6.3 as this version is unusable (getting a crash a minute when browsing as i keep hitting flash content - flash blocker doesn't seem to be working so the content loads immediately).

Win7 pro 64bit.

Same issues - when i try and open a tab with any significant flash content (some small ads seem O.K. but anything more lie a video and it's a straight-up firefox crash). Have updated flash to the latest version and had no problems with 3.6.3. I'm getting firefox completely crashing (i get the "firefox has crashed" dialog) a lot due to flash being everywhere.
Adjusting the timeout doesn't do anything - the plugin isn't crashing - it's firefox that crashes. Currently looking to revert to 3.6.3 as this version is unusable (getting a crash a minute when browsing as i keep hitting flash content - flash blocker doesn't seem to be working so the content loads immediately).
Win7 pro 64bit.

I had the same problem. Firefox just kept crashing all the time, probably because there is so much Flash content on the web.
I updated all of my plug-ins, I increased the timeout time, neither solution did anything.
So I downgraded to 3.6.3, and voila! Everything's back to normal. Definitely a problem with the upgrade.
For downgrading purposes:
http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/

Question owner

I just reverted back to 3.6.3 and everything is working great again, definately a problem with 3.6.4 and flash content - odd how the release is meant to help if flash crashes (which it has never done for me until 3.6.4, if it is what is crashing) and has made things much, much worse.

I just reverted back to 3.6.3 and everything is working great again, definately a problem with 3.6.4 and flash content - odd how the release is meant to help if flash crashes (which it has never done for me until 3.6.4, if it is what is crashing) and has made things much, much worse.

Question owner

i have the same problem on booth of my home computers. i just uninstalled flash, and firefox works fine! someone should fix this bug quickly since most people will just switch to explorer and stay there forever!

i have the same problem on booth of my home computers. i just uninstalled flash, and firefox works fine! someone should fix this bug quickly since most people will just switch to explorer and stay there forever!

Question owner

Same problem here on Windows 7x64. Firefox 3.6.4 crashes on any site with significant Flash content. Will probably downgrade soon. A pity, I was looking forward to this release.

EDIT: Setting "dom.ipc.plugins.enabled.npswf32.dll" to false in about:config stops Firefox from crashing. Amusingly, this makes Firefox stop using a separate process for Flash, which was the entire point of 3.6.4.

Same problem here on Windows 7x64. Firefox 3.6.4 crashes on any site with significant Flash content. Will probably downgrade soon. A pity, I was looking forward to this release.
EDIT: Setting "dom.ipc.plugins.enabled.npswf32.dll" to false in about:config stops Firefox from crashing. Amusingly, this makes Firefox stop using a separate process for Flash, which was the entire point of 3.6.4.

If you're still having issues with Firefox 3.6.4 and/or the Flash plugin, Firefox 3.6.6 has just been released to address this issue and increase the dom.ipc.plugins.timeoutSecs pref to 45 seconds if it has still the default value. Please see Update Firefox to the latest version if you need help updating.

If you're still having issues with Firefox 3.6.4 and/or the Flash plugin, Firefox 3.6.6 has just been released to address this issue and increase the dom.ipc.plugins.timeoutSecs pref to 45 seconds if it has still the default value. Please see [[Updating Firefox]] if you need help updating.